On 2005-11-23, at 0050, Eric Langheinrich wrote: > I have a growing problem with the number of failed messages where > qmail > posts a failure with Connected to x.x.x.x but connection died. > Possible > duplicate! > > After doing some initial investigation I've seen a few posts from > people > with a similar issue, but haven't seen any responses to the question. > > Does anyone have any idea why I would be getting these messages? Is > there a > known fix? What can I do to investigate why the errors are occurring?

the only times i've seen this are when i happened to be working on a machine whose IP was ":deny" line in the server's tcpcontrol file (usually /etc/tcp.smtp.cdb.) if such a machine connects to a service handled by tcpserver, the socket will be accepted and then immediately disconnected- resulting in the error message you are seeing.

you may wish to make sure your machine's IP address isn't listed in any of the common blacklists, and/or the receiving server (if it's always the same server) might have some other reason to refuse mail from your IP address.

> you may wish to make sure your machine's IP address isn't listed in > any of the common blacklists, and/or the receiving server (if it's > always the same server) might have some other reason to refuse mail > from your IP address.

"Possible duplicate" indicates the connection died after the client sent DATA, often a sign that the servers content filtering is being maxed out. We've seen an unusual amount of these today from hotmail.